HomeFish encyclopediaRay-finned fishesPerch-like fishSea basses: groupers and fairy bassletsThreadtail anthias Threadtail anthias (Tosana niwae) Scientific name: Tosana niwae Smith & Pope, 1906 The Threadtail anthias (Tosana niwae) is a marine fish of the family Serranidae. Native range: Western Pacific, southern Japan to the South China Sea. Species factsScientific nameTosana niwaeFamilySerranidae (Sea basses: groupers and fairy basslets)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length16.0EnvironmentMarine; demersalClimateSubtropicalDistributionWestern Pacific: southern Japan to the South China Sea.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026